Improvement in steam-pumps



M. SCHULTZ. Steam-Pump.

264,619. Patented June4, I878.

UNITED STATES PATENT OFEICE,

MICHAEL SCHULTZ, OF CINCINNATI, OHIO.

IMPROVEMENT IN STEAM-PUMPS.

Specification forming part of Letters Patent N0. 204,619, dated June 4,1878 application filed April 26, 1878.

To all whom it may concern:

Be it known that I, MICHAEL SCHULTZ, of Cincinnati, Hamilton county,State of Ohio, have invented an Improvement in Steam- Pumps, of whichthe following is a specification:

My invention has for its object the cheapenin g of the cost ofconstruction of steam-pumps, or, more particularly speaking, that classof steam-pumps known as boiler-feeders, while at the same time lookingspecially to the efficiency and reliability of the devices employed.

Therefore my invention refers to a class of pumps employing a steam andpumping piston combined to act in a direct manner, and having across-head and sliding-box device to impart rotary motion to a governingfly-wheel through its crank-pin; and my invention consists of theapplication of a device, whereby I am enabled to dispense with thesliding box of the cross-head and its accompanying feature of a slidingfrictional surface, said device being essentially a roller moving freelyupon the crank-pin of the fly-wheel shaft, and adapted to play freelywithin the slide of the cross-head, where it is preferably retained byflanges upon the lower part of the slideway, which also form inconnection therewith a lubricant-chamher.

In the accompanying drawings, Figure 1 is a perspective view of avertical direct-actin g boiler-feeder embodying my invention. Fig. 2 isa sectional elevation of the cross-head and my improvements. Fig. 3 isafront elevation of the same.

A is the slotted cross-head of the pump, formed in two parts, andsecured between the steam and pumping sections of the piston B, whichplays vertically between the steam and pumping chambers C D. Thefly-wheel E is secured upon shaft e, which is journaled in the frame ofthe pump, and provided at its inner end with crank-plate F and pin F,while it also operates the steam-valves.

The pump thus constructed is what isknown as a vertical direct-actin gboiler-feeder, and the necessary motion has heretofore been imparted tothe governing fly-wheel by means of a sliding box in the cross-head andupon the crank-pin F but the unreliability of this manner of operatingthe fly-wheel, owing to the tendency of the sliding box to stick, aswell as the great amount of frictional resistance generated, has led meto devise and employ a roller, G, to fit freely in the slot of thecross-head and upon crank-pin F.

The movement of the roller in the slot is rotary alternately in opposingdirections, accordingly as the upper or lower face of the slot pressesagainst it, and the face of the roller, by presenting its every partsuccessively as it moves along the slot, obviates all frictionalresistance that would be present in the operation of the sliding boxheretofore used.

In order to secure the roller within the slide- Way of the cross-headand upon the crank-pin, I secure upon the lower part of the cross-headflanges H, which rise above the lower boundary of the slot upon eachside thereof, and embrace the ends of the roller, and these flanges alsoform, in connection with the lower or bottom surface of the slot, an oilor lubricant receptacle for the retention of a sufficient quantity tokeep the connection properly lubricated.

In the drawing, the flanges H are secured by screws upon the exteriorsurface of the cross-head, and they may be securedin proper recesses.

In connection with this description I will state that I am aware of theexistence of what are called "anti-friction rollers, used for va-" riouspurposes. ,1

Having thus described my invention, what 1 claim as new, and desire tosecure by Let} ters Patent, is-

In combination with slotted cross-head A of the piston and roller G uponthe crank-pin, the flanges H, arranged substantially in the manner andfor the purpose specified.

In testimony of which invention I hereunto set my hand.

MICHAEL SCHULTZ. Witnesses:

JOHN H. DUHME, J omv E. J ONES.

